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L. BAUMGARTL.

CEMENTv SLAB 0R TILE WITH LIGHT PANE.

AAPPLICATIQN FILEDA FEB. I0. 1916.

Patented Aug. 22, 1916.

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/vo TT L. BAUMGARTL. CEMENT SLAB 0R TILE WITH LIGHT PANE.

APPLICATION FILED FEB. 10,1916. I

' Patented Aug. 22,1916.

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LEROY BAUMGARTL, OF CHICAGO, rILLINOIS, ASSIGNOR TO FEDERAL CEMENT TILE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOIS.

CEMENT SLAB 0R `TILE WITH LIGHT-PANE.

, Specification of Letters Patent.

Patented Aug. 22,1916.

To'aZZ whom 'it may concern:

Be it .known that I, LEROY BAUMGARTL, a citizen of the United States, residing at Chicago, in the county -of Cook and State of Illinois, have invented new and useful Improvements in Cement Slabs or Tile with Light-Panes, lof which 'the following is a t specification.

My invention relates to slabs, or tile, provided with section s of glass forming illu-` minating areas; and, more particularly, cement slabs, or tile, used for roofing purposes where such illuminating areas are desired.

My objects, generally stated, are to provide a cement slab,'or tile, of the relatively thin type, which, while presenting the desired strength, will afford a relatively large illuminating area; to provide for the eollecting and conducting away from the underside of the inset glass section to a desired point of discharge, water condensing thereon; and to provide against the freezing of the water in the course of its discharge from the slab, or tile.

Referring to the accompanying drawings, Figure 1 is an isometric view of a portion of a roof structure formed of slabs, or tile, certain of which are constructed in accordance With'my invention. Fig. 2 is a plan view of my lmprovedslab, or tile. Fig. 3 is a view in elevation of one end of the tile of Fig. 2. Fig. 4 is an enlarged section taken at the line 4 on Fig. 2 and viewed'in the direction of the arrow; and Fig. 5, an enlarged section taken at the line 5 on Fig. 2 and viewed in the direction of the arrow.

My improved tile, in accordance with the preferred embodiment of my invention, consists of 'a body-portion 6 of comparatively great superficlal area and relatively thin. The body-portion `6 contains intermediate its ends and sides a relatively large opening 7 in which la light pane 8, as for example, a pane of wire glass, is coniined to aii'ord the illuminating'area desired. The opening 7 is framed, preferably at the underside of the body 6, of the slab, or tile,.by the ribs 9, 10, 11 and 12, arranged in the form of a rectangle, as shown, the ribs 11 and 12 referably extendingto the outer edge o the slab or tile, as represented in Fig. 5. The rib'9 which is locatedat the end of the tile,

which would be the upper end when the tileA siderably short of the extreme upper edge of kmon practice, for coperation 1n bars just referred to.

is usedto form a slanting roof, extends conthe tile, as shown in Fig. 4, this extremity of thetile being provided with a depending flange, or lip, 13, at which the slab or tile 1s adapted to interlock with the beams, or glrders, on which they are laid in constructing the roof. The opposite, lower end, of the slab, or tile, is provided intermediate its edges with a socketing section 14 which extends above the plane of the body 6, as illustrated in Fig. 3, the socketing ortion of the section 14, being represente at 15, at which the slab, or tile, is adapted to it over the .adjacent end of a coupling or joining bar connecting adj acentedges of slabs or tile immediately beneath, and in break joint relation therewith, as is common practice. The slab or tile as shown is also provided along -its opposite lateral edges with upwardly-extending flanges, or ribs, 16, which, by preference reach short of the ends of the slab or tile, as represented in Fig. 2, these ribs being provided, in accordance with comwith the joinn the manufacture of my improved slab 89 or tile, it is cast from cement introduced into a mold, not shown, having the desired shape, to produce the structure as described. The light pane 8 is preferably united with the body 6 of slab or tile, by molding the 8,5 cement about the upper and lower marginal edges of the pane 8, as indicated in the drawings. To this end the light pane 8 would be so positioned in the mold, as is understood in the art, as to cause thecement 90 to become interlocked therewith, as stated,

for holding the light pane in place.l As the coeiiicients of expansion of concrete and glass are not the same, it 'is desirable that provision he made for this unequal expansion and contraction, this`preferably bemg accomplished by interposmg between the marginal edges ofthe pane 8 and the adjacent pane-confining portlons of the body 6, any desirable yielding material which will form a tight joint between the pane and the body y 6 and still permit of the expansion and contraction of the pane 8 and body 6 relative to each other.

The body 6 may be reinforced or -not, as 105 desired. Reinforcement, however, 1s preferred, and as a desirable arrangement of reinforcement, I provide rods 17 and 18 wardly offset, as represented. Other rods 21 and 22 are embedded in the body 6 adj acent the framing sections 9 and 10.

In the use of slabs, or tile, presenting illuminating areas of transparent or semitransparent material, it. is necessary that provision be made for preventing water condensing on the inner surfaces of the illumi-l are built on anincline.

nating sections, from running down and dropping 'into the inside of the building, it being understood that such roof 'structures In my improved slab provision is made for intercepting the water of condensation forming on Ythe underside of the illuminating section of the slab or tile, and conducting it to the outer surface of the roof. This is accomplished in the preferred illustrated embodiment 4of my invention, by forming in the end of the slab, or tile, providedwith the socketing section 14, the passage or conduit 23 which extends from the inner face of the flange 10 to and through the ladjacent extremity of the tile, or slab, as represented in the drawings, this conduit coperating with means which intercept and deflect into the said conduit the water thus condensed. The means shown are in the form of a trough 30 which extends across the inner face of the flange 10, from the flange 11 to the flange 12. This trough may be of any desired shape or construction, it being preferred, however, that it be formed of metal embedded at its lower edge and ends in the flanges 10, 11'.and 12, respectively, leaving its upper edge free, with the portions of the trough converging from the flanges 11 and 12 downwardly to apoint where the conduit 23 registers with the trough, as illustrated in Fig. 5.

In Fig. 1 the manner of using the slab, or tile, is clearly shown, 'and while the general arrangement of the various slabs, or tiles, shown, is in accordance with common practice, it may be said that the upper andlower row of slabs, or tile, are of the type in which no light pane is employed, whereas the center row is formed of slabs, or tile, constructed in accordance with my invention. rlhe break joint relation of the slabs, 0r tile, of adjacent rows is illustrated, the joining bars hereinbefore referred to and coperating with the flanges 16 of adjacent slabs, or tile,-

and extending at their upper ends into the sockets15 of the slabs, or tile, of adjacent upper series, being represented at 24.

It will be readily understood from the foregoing that while the body 6 of my improved tile is relatively thin, afeature which is manifestly a desirable one, the illuminating area of the slab, or tile, is relatively great, thus producing the maximum efficiency of the 4tile for skylight roofing purposes.

lThe location of the conduit 23,'as shown and described, causes it to incline downwardly from the direction of its point of discharge, when the slab, or tile, is `positioned for use in'a roof, and thus water of condensation owing down the underside of the illuminating sections 8, wil1 be intercepted by the trough and discharged through the conduit 23 upon the slabs, or tile, beneath them. Where the slabs, or tile, are to be used in cold climates, provision should be made for' preventing the clogging of the conduits 23, by freezing of the water discharging therethrough. I prefer to so shape the conduits 23 and to provideY them of such cross-sectional dimension, relative to the amount of water which would pass therethrough, when the slabs, or tile, are in use, that the stoppage of the conduits by freezing will be prevented. Owing to the necessity of cutting away of as little of the material of the slabs, or tile, as possible, in order that the advantage of making the tile thin, may be availed of, the conduits 23 are preferably so formed as to present a large cross-sectional area at their outer ends, as compared with the remaining portions of the conduits, and thus the water discharging therethrough, and which it is found in practice would only freeze at the outer ends of the conduits, is caused to spread out, so to speak, over the bottom surface of the outer ends of the conduits, and if freezing does occur it will not entirely choke the conduit. Furthermore, and preferably in addition to the feature of the conduits just stated, 'I prefer to form the lower extremity of the lower wall of the conduit with a sharply downwardly deflected section 25. Thus, water discharging down the conduit 23 upon the surface 25 will run very rapidly through the zone where freezing might occur, and will, to a relatively great degree, discharge from the' extreme lower edge of the section 25, as distinguished from hanging thereon in the form offdrops. Furthermore, as will be readily understood, theupper portion of the surface 25 is kept free from the formation of drops of water thereon.

While I have 1llustrated and described a particular construction of article embodying myinvention, I do not wish to be understood as intending to limit it thereto, as the same'may be variously modified and ali by Letters Patent isbody l. A slab or tile of the character set forth,

comprising a relatively of cement or the like, therethrough extending closely adjacent to the longitudinal sides, a section of translucent material conned in said opening, said body portion having reinforcing ribs alongI its longitudinal sides in which said translucent material is embedded, and a central reinforcing rib longitudinally disposed adjacent one of, the edges, said rib being of sufficient width to provide a passage communicating with tl 1e underside lof the translucent mate-ial for conducting moisture to the upper surface of an adjacent and lower slab, and having a space adjacent sa'id passage adapted to coact Withthe ribs of an adjacent section.

2. A slab or tile of the character set forth, comprising a relatively thin body portion of cement or the like, having an opening therethrough extending closely adjacent to the longitudinal sides, a section of translucent material confined in said opening, said portion having reinforcing ribs along its longitudinal sides in which said translucent material is embedded, and a central reinforcing rib longitudinally disposed adjacent one of the edges, said rib being of sulithin body portion having an opening cient width to provide a passage communicatlng with the underside of the translucent and a drip cup extending transversely of the slab adjacentthe lower edge of the translucent material to collect the moisture therefrom and conduct it through said passage.

3. A slab or tile of the character set forth, comprising a relatively thin body portion of cement or the like, having an opening therethrough extending the longitudinal sides, a section of translucent material conined in said opening, said body portion having reinforcing ribs along its longitudinal sides in which said translucent material is embedded, and a central reinforcing rib longitudinally disposed adjacent one of the edges, said rib being of sufficlosely adjacent to cient width to provide a passage communicating with the underside of the translucent material for 'conducting moisture to the upper surface of an adjacent and lower slab, having a space adjacent said passage adapted to coact with the ribs of an adjacent section, and a drip cup extending transversely of the slab adjacent the lower edge of the translucent material to collect the moisture therefroml and conduct it through said passage.

LEROY BAUMGARTL. In presence of- O.V C. AvrsUs, D. C. THoRsEN.

35 materlal for conductlng molsture to the upv peasurface of'an adjacent and lower slab, 

